Indicator-lock



(No Model.)

0. 81; W. PEARSON.

INDICATOR LOCK.

N0. 313,232. Patented Mar; 3, 1885.

N PUERs. Phnlo-hlhogmplucn washm mn. [1cv Nrrn V TATES ATENT rrrca.

CHARLES PEARSON AND WILLIAM PEARSON, OF lVEBSTER, NEW

HAMPSHIRE.

INDlCATOR-LOCK.

EiBl'iC'EFICATION forming part of Letters Patent No. 313,232, dated March 3, 1885.

Application filed February 18, 1884.

To all whom i!) may concern.-

Be it known that we, CHARLES PEARSON and WILLIAM PEARSON, both residents of XVebster, in the county of Merrimac and State of New Hampshire, have invented a certain new and useful Improvement in Indicator- Locks, ofwhich the following is a specifica tion.

Our invention relates to that class of doorfastenings which are designed to fasten or look a door either with or without the use of a key.

The invention consists of a certain device for preventing the sliding latch of a door, or the rocker through which the knob spindle passes, from being moved or operated by said knob-spindle when a door is closed by any one who may be outside.

The invention is clearly shown in the accompanying drawings, forming part of this specification, in which similar letters of reference indicate corresponding parts in all the figures, of which- Figure l is a side view of a lock havin a portion of the housing broken out, exposing our improvement. Fig. 2 shows the reverse side of the lock; and Fig. 8 shows a portion of a door -stile in perspective, having mortised therein our improved fastening. Y

The case or housing A is provided with a sliding bolt or latch, B, having a finger, 1), against which a rocker, C, will rest. Said rocker is provided with a square hole, 0, through its center, into and through which the square knob'spindle D is passed.

In order that a person within may be able to prevent those outside from turning the knob-spindle and thus gaining entrance, we place within the case or housing A a wheelsection, E, hung on a pivot or screw,'e, so placed as that it may be readily rotated so as to bear against the back part of the finger b, and thus prevent the latch B from be ing moved by the rocker O and knob-spindle D.

The wheel-seetion IE will be limited in its.

movement, the distance being determined by a suitable thumb-piece or button, F,'wh'ich may be secured to the part E, and pass out (No model.)

through a slot, a, in the housing A, said slot being made the proper length to allow sufficient movement for the wheel section E. The slot a will be made on a curve the radial center of which will be the pivot or screw 6.

Another slot may be formed on the opposite side, and conveniently utilized for the display of some such word as engaged, locked, or occupied,, as shown in Figs. 2 and 8, for use upon doors in hotels, state-rooms, or railway-cars. The word may be so placed upon thewheel-section E as to show through a slot, h,'in the outside of the door H, opposite to the said slot in the housing, when the said wheel-section E is placed, as shown by full lines in Figs. 2 and 3; but when said wheel-section has been rotated to the position shown by dotted lines in Fig.

l the latch 13 will be free to move, and may be operated either from the outside or inside of a door by means of the knob, and nothing will be seen in the slot h but the plain surface of the said wheel-section E. The slot h, cut in the door H, should be beveled on its sides and ends, as shown in the drawings.

It may sometimes be desirable to be able to lock or fasten a door on the outside, in which case the construction of the part E may be so changed as that it may be operated by a key.

The latch 13 may beheld so as to project outside the door, as shown in the drawings, by some suitable spring; or a weight, I, may be attached to a right-angled lever, J, fulcrumed at K, and said lever operate against said latch B and accomplish the same purpose as a spring.

It will be readily seen that the wheel-section E serves two purposes-via, that of an annunciator and a fastening for the latch B.

Having thus'fully described our invention, what we claim, and desire to secure by Letters Patent of the United States, is

A door-lock consisting of a suitable housing, A, having on either side thereof holes for the knob spindle, and curvilinear slots, as shown, and containing the latch-bolt B,

-piece F, acting in one of said curvilinear B, all constructed and operating substantially in the manner described.

CHARLES PEARSON. WILLIAM PEARSON.

rocker 0, through which passes the knobspindle D, and the right-angled weighted 1e- Ver J, for projecting said ]atehbo1t-, and the annnnciator-fiistening E, pivoted on screw 6, which may be rotated by aid of the thumb- Witnesses:

PAUL PEARSON, M. A. PILLSBURY;

slots, and prevent the movement of saidlatch 

